Pros: They are pretty accurate, the bass however is bumped up about 8db above 0 for the bassheads.(like my former self)
Cons: the wires are outside the headphone, cup holders meh.the wires are strng though you wont have to worry about those much but they're exposed.
q40>xb1000 in terms of sound and bass.
q40=m50 in terms of everything.
cable is very long, great for movement during sessions and can be used to mix clearly.The bass is big, but doesn't overpower the mids or highs due to the choice of fabric they used on the headphone cups.The clamping was bad at first, ears sore as doodoo after 35 minutes.